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| <div class="section" id="cmake-find-package-sort-order"> |
| <span id="variable:CMAKE_FIND_PACKAGE_SORT_ORDER"></span><h1>CMAKE_FIND_PACKAGE_SORT_ORDER<a class="headerlink" href="#cmake-find-package-sort-order" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>The default order for sorting packages found using <span class="target" id="index-0-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal"><span class="pre">find_package()</span></code></a>. |
| It can assume one of the following values:</p> |
| <dl class="docutils"> |
| <dt><code class="docutils literal"><span class="pre">NONE</span></code></dt> |
| <dd>Default. No attempt is done to sort packages. |
| The first valid package found will be selected.</dd> |
| <dt><code class="docutils literal"><span class="pre">NAME</span></code></dt> |
| <dd>Sort packages lexicographically before selecting one.</dd> |
| <dt><code class="docutils literal"><span class="pre">NATURAL</span></code></dt> |
| <dd>Sort packages using natural order (see <code class="docutils literal"><span class="pre">strverscmp(3)</span></code> manual), |
| i.e. such that contiguous digits are compared as whole numbers.</dd> |
| </dl> |
| <p>Natural sorting can be employed to return the highest version when multiple |
| versions of the same library are found by <span class="target" id="index-1-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal"><span class="pre">find_package()</span></code></a>. For |
| example suppose that the following libraries have been found:</p> |
| <ul class="simple"> |
| <li>libX-1.1.0</li> |
| <li>libX-1.2.9</li> |
| <li>libX-1.2.10</li> |
| </ul> |
| <p>By setting <code class="docutils literal"><span class="pre">NATURAL</span></code> order we can select the one with the highest |
| version number <code class="docutils literal"><span class="pre">libX-1.2.10</span></code>.</p> |
| <div class="highlight-cmake"><div class="highlight"><pre><span></span><span class="nb">set</span><span class="p">(</span><span class="s">CMAKE_FIND_PACKAGE_SORT_ORDER</span> <span class="s">NATURAL</span><span class="p">)</span> |
| <span class="nb">find_package</span><span class="p">(</span><span class="s">libX</span> <span class="s">CONFIG</span><span class="p">)</span> |
| </pre></div> |
| </div> |
| <p>The sort direction can be controlled using the |
| <span class="target" id="index-0-variable:CMAKE_FIND_PACKAGE_SORT_DIRECTION"></span><a class="reference internal" href="CMAKE_FIND_PACKAGE_SORT_DIRECTION.html#variable:CMAKE_FIND_PACKAGE_SORT_DIRECTION" title="CMAKE_FIND_PACKAGE_SORT_DIRECTION"><code class="xref cmake cmake-variable docutils literal"><span class="pre">CMAKE_FIND_PACKAGE_SORT_DIRECTION</span></code></a> variable |
| (by default decrescent, e.g. lib-B will be tested before lib-A).</p> |
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